About the BMI Calculator
Body Mass Index (BMI) is a simple screening tool that measures body fat based on height and weight. Our BMI calculator supports both metric (kg/cm) and imperial (lb/in) units, and also calculates your Basal Metabolic Rate (BMR) — the number of calories your body needs at rest — using the Mifflin-St Jeor equation.
BMI Formula (Metric): BMI = weight(kg) ÷ height(m)²
BMI Categories: Underweight <18.5 · Normal 18.5–24.9 · Overweight 25–29.9 · Obese ≥30
Note: BMI does not account for muscle mass, bone density, or fat distribution. Consult a doctor for medical advice.